Lucas Mearian: “A Chinese company has become the first to construct multiple buildings using 3D printers that extrude recycled building materials at breakneck speed. Using four huge 3D printers, Yingchuang New Materials Inc. was able to print the shells of 10 one-room structures in 24 hours and at a cost of only about $5,000 per building. The buildings had to harden at the factory and then be transported and assembled on site. The 3D printed buildings will be used as offices at a Shanghai industrial park. The printers, supplied by WinSun Decoration Design Engineering, are 20 feet tall, 33 feet wide and 132 feet long. Like their desktop counterparts, the construction-grade WinSun 3D printers use a fused deposition modeling (FDM) technology to deposit materials one layer at a time in a process that’s similar to squeezing frosting from a pastry bag.”